Download Computer Aided and Integrated Manufacturing Systems: Volume by Cornelius T. Leondes PDF

By Cornelius T. Leondes

This is often a useful five-volume reference at the very vast and hugely major topic of machine aided and built-in production structures. it's a set of enormously titled and well-harmonized volumes via major specialists at the overseas scene. The thoughts and applied sciences utilized in machine aided and built-in production platforms have produced, and may doubtless proceed to provide, significant annual advancements in productiveness, that's outlined because the items and companies made from every one hour of labor. This booklet offers rather with better usage of work and capital, specifically info expertise structures. jointly the 5 volumes deal with comprehensively the foremost concepts and applied sciences which are concerned.

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Extra info for Computer Aided and Integrated Manufacturing Systems: Volume 2 Intelligent Systems Technologies

Sample text

8(a) and (b). With the help of feature information, these two classes of assembly relations between parts can be converted into a single representation contact relation. Through the assembly relation between a feature and a related part, contact relations in different directions can be defined. For example, in Fig. 8(a), part B fits into part A along the +X direction (assume that the fitting axis is along the X axis) through its feature fB\ in,Fig. 8(b), part B contacts with part A through its feature f'B along the +X direction, and part A contacts with part B through its feature f'A along the -X direction.

Similarly, in Fig. 13(c), part pi is the target part in the —X direction; fl3 of part P13 and ff are the features found in Steps 1 and 2, respectively. Since fl3 is farther than /j 2 , part p^ is rejected in the —X direction. After a part has been identified as a candidate, the determination of its removal is made by considering the stability of the assembly structure. This will be discussed in stability and security constraints below. As described above, the qualitative representation of possible connectives, motions, and how they are constrained in three-dimensional space can be expressed by two binary functions, C-function and F-function, in the liaison model where the six entries represent the six directions of motion as described above.

12 are inferred as: precede(l15) = {p3}, precede(li6) = {p5,p3}, precede{l27) = {p 4 }, precede(Ui) — {p2} Also, the set of liaisons and the set of parts are derived as: LS(P2) = {In}, LS(p3) = {ii 5 ,ii6},iS(p 4 ) = {Z27}, LS(P5) = {l16}, PS(P5) = {pi,p3}, PS(p7) = {P2,Pi}. Besides the C and F functions above, the predicates such as precede in Table 2 is further used to represent some partial precedence relations in an assembly so as to interactively simplify and help the geometric reasoning. ; and "—" represents NOT.

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